Abstract:
Fear stress reduces the gastric transit time (GTT) of layer chicken. Vitamin B and C
are used to reduce the stress in poultry. Th e objective of this study was to determine
whether provision of water supplemented with vitamin B or C would overcome the
stress associated changes in GTT in layer chicken. Layer chicken (n=16) were
individually housed in raised floor wire-mesh cages. Eight birds were given vitamin C
supplemented water for four days while others (n=8) were supplied with normal water.
On fifth day, GTT was determined. Following seven hours of feed deprivation period,
birds were offered a commercial layer diet. An observer was assigned to each bird and
the time of first faecal pellet expulsion was recorded. The time difference between the
offer of feed following the feed deprivation and the time of first faecal pellet expulsion
was taken as the GTT. The GTT under fear -stressed condition was determined next
day using the same procedure. Birds were stressed by ringing a bell at every 15
minutes until the last bird voided the first faecal pellet. A similar method was used to
study the effect of vitamin B on GTT. The level of vitamin concentration in water was
100 ppm. Under un-stressed conditions, provision of vitamin B or C enriched water
had no significant effect on GTT. When stressed, irrespective of the type of water
provided, GTT reduced significantly. Simi lar results were observed when GTT was
expressed as GTT/100g BW and GTT/LW (g) 075. It was concluded that fear-stress-induced reduction in GTT of layer chicken can not be recovered by giving water
supplemented with vitamin B or C.
